CN1042360C - Suspended digital control marking device for well logging cable - Google Patents

Abstract

The present invention relates to a suspended digitally controlled marking device for a well logging cable, which is used for accurately calibrating well logging depth. The present invention is characterized in that a photoelectric signal generated by a metering wheel is controlled by a driving circuit and an electromagnetic converting circuit to form a strong and narrow magnetic mark signal on the well logging cable after digitally compared and treated. The present invention has the advantages of simple and convenient operation, reliable precision, high anti-interference capability, etc.

Description

Suspended digital control marking device for well logging cable

The present invention relates to depth-logger calibration technique field.

One of main purpose of oil well logging is in order to determine the depth location of oil reservoir in subterranean boreholes.Fasten instrumentation with logging cable and transfer to the down-hole, instrument transfer or in the process carried, by certain technical finesse and explanation, detect position, the thickness of oil reservoir and related parameter arranged.In order to find the position of oil reservoir exactly, must accurately measure the length of cable.Past is to be measured again and again by 7-9 people (general 25 meters), and makes a tangible mark (as twining with friction tape), makes a special obvious mark at 500 meters or 1000 meters.The mark of doing with the method for manually measuring grinds off easily.Along with technological progress, after change into electromagnetism and make dark mark.But still need 7-9 people, and people's ruler after a little while holds up inaccurately, and error is big, and when especially wind being arranged, error is bigger, even can't marking.In order to ensure precision, improve timeliness, minimizing personnel and labour intensity, the device from action token has successively all done in the national respectively unit of well logging, at " standardization " well head of regulation, a simple and easy derrick is installed, and is measured one 25 meters permanent sign.Lay a receiver (electromagnetic sensor) at 25 meters well head one ends, lay one at the other end and annotate chinaware, the device control of centre from action token.This device has electron tube, has semi-conductively, also has hybrid-type or the like.No matter adopt the sort of device, their basic principle is consistent, all is to adopt the induction type principle.On cable, annotate a magnetic flag earlier, along with the cable displacement, during by the well head receiver, produce an induced electromotive force, through amplification one of shaping rear drive annotate magnet assembly (electron tube is arranged, relay, silicon controlled is also arranged), on cable, inject a magnetic flag.Along with the displacement of cable, when this magnetic flag that is injected into is displaced to well head, goes again to drive and make next magnetic flag.And so forth, automatically do down one by one.This method from action token has reduced artificial error, has reduced labour intensity, has saved personnel.But guarantee 1 ‰ precision, skilled operating personnel must be arranged, and require under not unusual or the like the condition of all even natural environment of the speed of logging cable winch, just to perform.These shadows in factor, most critical be the speed of logging cable winch.Speed is irregular, " big or small lattice " (i.e. the length of 25 meters marks at interval inconsistent) can occur, and often because of not reaching the desired precision recast of doing over again, till meeting standard, the magnetic flag of this method making is also lost when the depth measurement well easily.

The objective of the invention is on the basis of the U.S.'s 3700 digital logging recorders and the large-scale single arm type degree of depth of French Schlumberger digital logging recorder metering device, characteristics in conjunction with the used a large amount of logging cable winch of China, develop a kind of inhomogeneous variable effect of cable velocity of displacement that is not subjected to, the logging cable of the floated digital coding control of the novel level that not influenced by the outside diameter of cable is from the action token device.

Operating principle of the present invention is as follows: when logging cable is clamped between two measurement wheels, as long as cable is subjected to displacement, rotation is followed in the measurement wheel cable outer layer friction effect of being logged well, encoder is installed on the metering wheel shaft and also rotates by rotating shaft angle thereupon, and send a series of photoimpact, through frequency division, form counting clock, the one tunnel enters five reversible cumulative length counters becomes the cumulative length demonstration through the decoding driving.During 1 meter of cable displacement, measurement wheel rotates 2 circles, and the cumulative length display shows increases by 1.0 meters.Another road enter three synchronous cable shift length counters and directly be subjected to dial switch control from the action token circuit.Length counter and cumulative length display are synchronous demonstrations, and both do not exist together is that the cumulative length display is the total length of cable displacement, are cumulants; And the length display is to show each mark length of inner cable displacement at interval, whenever it reaches moment that son puts length (being generally 25 meters) all can automatic clear, again count, in zero clearing simultaneously, make controllable silicon conducting in the electromagnetic switching circuit by drive circuit, under the effect of high voltage, big electric current, on cable, produce a strong magnetic marking signal.So circulation is till the whole piece logging cable is finished mark.

Fig. 1. metering unit support front view;

Wherein: (1) (1 ') support; (2) preceding supporting base; (2 ') rear branching holder; (3) the preceding guiding contact roller of going up; (4) guiding contact roller on the back; (5) (5 ') shroud cavil; (6) (6 ') hub disk cavil; (14) annotate chinaware;

Fig. 2. metering unit bracket side view;

Wherein: (3) preceding guiding contact roller of going up; (3 ') preceding guiding down contact roller; (4) guiding contact roller on the back; (4 ') back is the guiding contact roller down; (7) fixed strain spring;

Fig. 3. measurement wheel suspension structure schematic diagram;

Wherein: (1) support; (3) the preceding guiding contact roller of going up; (3 ') preceding guiding down contact roller; (4) guiding contact roller on the back; (4 ') back is the guiding contact roller down; (5) (5 ') shroud cavil; (6) (6 ') hub disk cavil; (8) (8 ') measurement wheel; (14) annotate chinaware;

Fig. 4. the measurement wheel front view;

Wherein: (8) (8 ') measurement wheel; (9) encoder; (10) selsyn; (11) (11 ') supporting plate; (13) open mechanism;

Fig. 5. digital control circuit electricity theory diagram;

Fig. 6. the digital control circuit electrical schematic diagram;

Below in conjunction with accompanying drawing the present invention is described in further detail.

The present invention is the device of dynamo-electric unification, and some is a metering unit, and mainly measurement wheel, encoder, notes chinaware and the motor synchronizing angle machine that is suspended by level formed.It is suspended on the logging cable.Another partly mainly by data handle, circuit such as artificial setting, demonstration and mechanical counter form.

(1) metering unit:

It is by measurement wheel, the guiding contact roller, and dish cavil and open mechanism and form can be divided into support and measure two parts.

(1.1) holder part: (seeing Fig. 1 and Fig. 2)

It by support 1 and 1 ', two pairs of supporting bases 2 in front and back and 2 ', leading to contact roller 3 and 3 ', back guiding contact roller 4 and 4 ' and front and back two pairs of dishes cavil 5 and 5 ', 6 and 6 ' etc. form.Before and after supporting base 2 and 2 ' on, be equipped with guiding contact roller 3,3 ' and 4,4 ', on take turns 3,4 and can throw off with supporting base, be convenient to load and unload cable, on to take turns 3,4 position be to be strained and fixed by spring 7.When cable by the time, this is taken turns cable is produced certain pressure, it leads on the one hand, reduces the cable effect of jitter on the other hand, make cable can pass through reposefully measurement wheel 8 and 8 '.It also will support metering unit and be suspended on the cable (see figure 3) in addition.Before and after dish cavil 5 and 5 ', 6 and 6 ' be mainly used in the influence that swings of restriction cable, it also will substitute the effect of the dish cable bar on the former logging cable winch simultaneously.Back guiding contact roller 4 and 4 ' the place ahead a square notes chinaware 14 has been installed, be used for to displacement cable marking.

(1.2) metering section: (see figure 4)

By measurement wheel 8 and 8 ', supporting plate 11 and 11 ', open mechanism's 13 compositions such as grade.Two measurement wheels 8 and 8 ' on encoder 9 and selsyn 10 have been installed respectively, when cable displacement (on carry or transfer), signal is sent by these two electromechanical transducers respectively, is delivered to the control circuit of annotating magnet assembly, is shown by LED and mechanical counter respectively again.Measurement wheel 8 and 8 ' between, be equipped with and open mechanism 13, so as logging cable put into two measurement wheels 8 and 8 ' between, and give certain clamping force, make cable when displacement, measurement wheel is non-slip, does not dally, and guarantees the dynamic accuracy of measuring.

(2) annotate magnet assembly:

It comprises control circuit, drive circuit, and electromagnetic switching circuit, mark length is provided with display circuit etc.Now that each circuit division is as follows: (seeing Fig. 5 and Fig. 6)

(2.1) control circuit:

The information of sending by encoder, after amplifying the shaping frequency division, the control circuit formed by dial switch and integrated circuit of one tunnel input wherein, the length that it is mainly used to the displacement of comparison cable whether with mark that length is set is consistent.When unanimity, export a control signal, remove the data of counter internal memory simultaneously again automatically.For relatively get ready next time.It is from one of accuracy guarantee of action token.This circuit is by cable shift length counter 3 * CL102, artificially be provided with three dial switch circuit (B6 of marking length, B7, B8), 4 * 2 NAND gate control circuit CD4012, six Si Mite delay circuit CD40106 and d type flip flop CD4013 circuit form.The groundwork process is, counter (3 * CL102) length data and artificial three (B6 that are provided with three storage cable shift lengths, B7, B8) dial data (being generally 25 meters) relatively, if export a positive pulse control signal by the CD4012 NAND gate circuit when consistent, after this signal divides three the tunnel to import the integration type delay circuit of being made up of CD40106 six Si Mite, the delayed control signal of three different purposes is provided respectively: one is that the signal that postpones 5 microseconds removes to trigger d type flip flop CD4013, the auxiliary signal (title gives triggering signal) of a main triggering signal of output, before being main triggering signal no show, the work of getting ready; Another after process mode gauge tap K6 selects, directly removes to trigger a high reliability drive circuit (by 3CG 21,3DG6,3DG12 composition) for postponing 20 milliseconds main triggering signal; The 3rd is the cable shift length data of going after delayed 5 microseconds to remove in three CL102 assemblies, for the next one is got ready from the cable shift length counting of action token.This circuit is mainly efficiently quick and precisely to be annotated magnetic a reliable and stable start pulse signal is provided.For the influence (in 8000 meters/hour scopes of speed limit) that overcomes velocity variations, it will guarantee that also annotating magnetic signal reliably ends.Remove to control the R end of d type flip flop CD4013 by the Q1 (A) of decimetre counter CL102 end, make pick-off signal of output, force and annotate chinaware and quit work, thereby the mark " by force " that reaches on the shift cable on the throne to be done and width " narrow:

(2.2) drive circuit:

It has, and antijamming capability is strong, and response speed is fast, and enough driving powers are provided.This circuit is made up of three grades of discrete elements.First order 3CG21 is an emitter-follower, is conducting at ordinary times; Second level 3DG6 is an on-off circuit, at ordinary times conducting; The third level is a power amplifier emitter follower during 3DG12 forms, and ends at ordinary times, and controllable silicon is not worked.When main triggering signal was come, the first order was ended, and end the second level, and third level conducting, the positive pulse of enough energy of output drives signal, makes controllable silicon conducting reliably; Can end reliably during no signal, guarantee that controllable silicon does not have misoperation.

(2.3) electromagnetic switching circuit:

By controllable silicon, annotate magnetic coil (be placed on and annotate in chinaware 14 side's copper boxes), charge and discharge compositions such as resistance capacitance and high voltage source, its one side transient state has tens of amperes big electric current by annotating magnetic coil, on cable, produce an extra-heavy magnetic sign, it has the characteristic of quick break-make on the other hand, and the efficient ferromagnetism sign of injection is not tested the speed to be influenced.Three stage drive circuits and improve the forward voltage supplied as far as possible to make that this requires accomplished.In order to observe overall process from action token, set up a LED (D2) who monitors charge and discharge process and shown, by secretly brightening, extinguish fast during marking during charging.

(2.4) mark length display circuit:

In order to monitor the situation that begins cable displacement when marking from " 0 ", adopt three five in one CL102 assemblies, it is synchronoused working with the cumulative length counter, the scope (maximum length) that shows is determined by the dial number of artificial setting, when number is set is 25 meters when placing a wheal, display is when " 0 " begins to be shown to 25 meters, automatic clear, return to again from " 0 ", for synchronous with the cumulative length counting, adopt trailing edge to postpone, and recover normal counting during to rising edge from clear.To have or not trigger impulse or malfunction in order observing when the action token, to be provided with a LED (D3) and sound circuit and to do to monitor usefulness, when trigger impulse is arranged, glittering and sounding each once.Its duty should be corresponding with the LED (D2) that annotates the magnetic supervision.

(3) encoding processor part:

The physical quantity that mainly solves the displacement cable length converts the digital quantity that shows with LED to, and it comprises encoder, phase detecting circuit, and frequency dividing circuit, counting circuit, decoding drives display circuit, compensating circuit etc., division is as follows:

(3.1) encoder:

By light emitting diode, optical disc, original screen panel, photosensitive tube, compositions such as photoelectricity amplification and rectification circuit.Send infrared light by light-emitting diodes degree pipe, see through the grating of forming by the light and shade line, make photosensitive tube receive the infrared signal of different brightness.When measurement wheel drives the optical disc rotation, the variation of shaft angle is converted to photosignal change, amplify the back through shaping and export a series of pulse signals.Adopt 360 encoder, measurement wheel takes two turns when 1 meter of cable displacement, and it sends 720 rectangular pulses.For the direction of distinguishing the cable displacement (promptly transfer or on carry), adopted phase sensitive detection circuit, can obtain " narrow " pulse of two different directions.

(3.2) frequency dividing circuit:

By two-way 72 frequency dividing circuits that CD4024 and 5C156 form, 720 pulses that encoder is sent become 10 pulses, as the decimetre clock pulses, i.e. and CP+ or CP-.

(3.3) counting circuit:

Form five with doubleclocking forward-backward counter CD40192 and dial switch and can preset the cumulative length counter, when clock pulses was CP+, counter was done add operation.When clock pulses is CP-, the counter subtraction.Dial switch can be made memory depth usefulness on the one hand, can make a certain well cross-talk in addition and put usefulness.

(3.4) decoding, driving, display circuit:

Form five light-emitting diode display with four unification CL802 assemblies, it cooperates with counting circuit, expression km, hundred meters, ten meters, rice and decimetre.When the cable displacement, it directly reflects the actual grade of well depth, promptly represents the physical location of instrument in the down-hole.

(3.5) compensating circuit:

By CD4093 and CD4068 form can be manually or automated manner compensate, reduce error, improve precision.

(3.6) self check clock circuit:

Be made up of CD4060 and CD4040, output 2KC and 0.5KC make self check usefulness, export and do in 1 second to show usefulness, export 1 fen do observation cable velocity of displacement and use.

(3.7) power unit:

By noise filter, circuit such as high-low voltage power source transformer, bridge are whole, voltage stabilizing and filtering are formed.

(4) mechanical count parts:

Mainly by two selsyns, gear and mechanical counter are formed, and when measurement wheel rotated, the selsyn that is installed in above it sent signal, receive selsyn and just drive the counter rotation, and when measurement wheel took two turns, mechanical counter shows increased by 1 meter.It is mainly winch and uses, and preserves the well depth data during simultaneously for power down and uses.

Compare with traditional induction formula labelling apparatus, the present invention has following characteristics:

1. anti-interference ability is strong, the impact that the cable speed of not logged well changes;

2. simplify well head, do not needed special-purpose wellhead assembly;

3. easy to operate, do not need skilled operating personnel;

4. precision height, resolution ratio is strong, is not subjected to environmental influence;

5. well depth numeral intuitive display, but the overall process of carrying on the monitoring cable or transferring;

6. the length from action token can be set arbitrarily, not need to regulate in a large number the spacing of wellhead assembly, and energy intuitive monitoring overall process;

7. it is strong to annotate magnetic mark, and can compensate automatically, is not subjected to the influence of the outside diameter of cable;

8. dynamo-electric combination can keep the well depth data after the power down.

Its main technical characteristics:

1. error precision: ±≤1 ‰;

2. resolution ratio: 1/2 degree (1.4 millimeters);

3. mark length: 0-99.9 rice is optional;

4. velocity of displacement :≤8000 meters/hour;

Claims (9)

1. a floated digital coding is controlled marking device for well logging cable, and this installs by forming with lower member:

(1) metering unit, comprising:

(1.1) support and guiding contact roller,

(1.2) measurement wheel,

(1.3) be installed in encoder and selsyn on the measurement wheel;

(2) annotate magnet assembly, comprising:

(2.1) control circuit,

(2.2) drive circuit,

(2.3) electromagnetic switching circuit,

(2.4) annotate chinaware;

(3) encoding processor part;

(4) mechanical count parts; It is characterized in that:

Described measurement wheel (8,8 ') clamping well cable then, and by front and back two pairs of guiding contact roller (3,3 ') (4,4 ') be suspended on the logging cable, front and back two pairs of dishes cavils (5,5 ') (6,6 ') the clamping cable, two measurement wheels (8,8 ') between be equipped with and open mechanism (13), the control circuit of annotating magnet assembly is that the data of multidigit cable shift length counter are compared with the data of the artificial multidigit dial storage of setting, when its value is consistent, adopt pulse control signal of NAND gate circuit output, this signal branch multichannel is input to the integration type delayer, provide a plurality of delayed control signals by delayer, main triggering signal wherein triggers drive circuit after the mode gauge tap is selected, drive circuit adopts multistage direct-coupled on-off circuit, drive circuit is when the main trigger action of control circuit, and the output positive pulse drives signal, makes the controllable silicon conducting in the electromagnetic switching circuit, position, end control d type flip flop by length counter, make pick-off signal of its output, force the notes chinaware to quit work, thereby by driving signal and pick-off signal control electromagnetic switching circuit at high voltage, on cable, produce a strong and narrow magnetic mark mark under the effect of big electric current.

2. floated digital coding control marking device for well logging cable according to claim 1, it is characterized in that: adopt (CL102) cable shift length counter of three, respectively the expression: ten meter, meters and decimeter, adopt three dial, adopt (CD4012) NAND gate, its output control signal is a positive pulse, this signal divides three the tunnel to be input to (CD40106) six these close particular integral formula delayers, described a plurality of delayed control signal, comprise a signal that postpones 5 microseconds, remove shift length counter and a sub-triggering signal.

3. floated digital coding control marking device for well logging cable according to claim 1, it is characterized in that: described drive circuit adopts the on-off circuit of three grades of direct couplings, the first order (3CG21) is an emitter-follower, be conducting at ordinary times, (3DG6) is on-off circuit in the second level, conducting at ordinary times, the third level is a power amplifier emitter follower in (3DG12), end at ordinary times, controllable silicon is not worked, and when main triggering signal was come, the first order was ended, end the second level, and third level conducting, the positive pulse of enough energy of output drives signal, makes controllable silicon conducting reliably, can end reliably during no signal, adopt LED to show the appearance of harmony to circuit monitors master triggering signal.

4. floated digital coding control marking device for well logging cable according to claim 1 is characterized in that: have the LED that monitors charge and discharge process to show in the described electromagnetic switching circuit, by secretly brightening, extinguish fast during marking during charging.

5. floated digital coding control marking device for well logging cable according to claim 1 is characterized in that: described high voltage, its scope be more than 300 volts, described big electric current, and its scope is more than 50 amperes.

6. floated digital coding control marking device for well logging cable according to claim 1, it is characterized in that: described encoding processor part is a plus-minus of a series of positive and negative pulses that detect through phase sensitive detection circuit of encoder output being controlled the cumulative length counter that can preset behind frequency division, by the decoder driving display, show the cumulative length value.

7. floated digital coding control marking device for well logging cable according to claim 1 is characterized in that: when cable moves 1 meter, described measurement wheel rotated for two weeks.

8. floated digital coding control marking device for well logging cable according to claim 1, it is characterized in that: the original screen panel encoder that adopts 360 lines, adopt two-way 72 frequency dividing circuit frequency divisions, adopt doubleclocking multiple tracks counter (CD40192) and dial switch to form five and can preset the cumulative length counter, adopt five light-emitting diode displays, represent respectively km, hundred meters, ten meter, meters and decimeter.

9. floated digital coding control marking device for well logging cable according to claim 1, it is characterized in that: described mechanical count parts, when measurement wheel rotated for two weeks, mechanical counter increased by 1 meter.

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